Homogeneous Pinus sp. particle boards reinforced with laminated composite materials

Abstract

This study aimed to evaluate the mechanical performance of laminated composite materials (fiberglass, carbon, sisal, palm fiber) in epoxy matrix as reinforcement in wood particleboards of Pinus sp. with bicomponent polyurethane resin from castor oil. Modulus of elasticity (MOE) and modulus of rupture (MOR) were investigated using a three-point bending test. Single-layered laminated plates were used to reinforce traction of specimens obtained from boards. MOE and MOR of materials developed without reinforcements exceeded limits in ABNT standards both NBR 12810-2:2002 and A208.1:199, proving therefore their feasibility. In all investigated cases, inclusion of reinforcements led to higher values for both MOE and MOR. Composites in fiberglass presented the best results. KEY WORDS:Particleboard, laminated composites, structural reinforcement. PAINÉIS HOMOGÊNEOS DE PARTÍCULAS DE PALAVRAS-CHAVE:Painéis de partículas, compósitos laminados, reforço estrutural.

A Preliminary Study about the Utilization of Cajueiro and Amescla for MDP Panels Production

“…Table 6 shows the values for density of the panels OSB manufactured with Cajueiro and Amescla wood species. The values found for density for the panels MDP from Cajueiro was 836 kg/m 3 and for the panels MDP from Amescla was 855 kg/m 3 . Similar values were demonstrated by [11], who obtained around 815 kg/m 3 for the panels manufactured with Eucalyptus grandis wood specie.…”

“…For tensile test parallel to face, the calculations was made according Equation 3, where a and b are the specimens widths in both directions. …”

“…The wood-based panels are manufactured product with blades or particles in various stages of disintegration, agglutinated by the action of a binder (resin), heat and pressure [1][2][3][4][5][6][7][8]14].…”

Efeitos das intempéries na rugosidade de painéis de partículas de Pinus sp.

“…Optou-se pela utilização de partículas processadas em sua totalidade, utilizando também os finos obtidos no processamento. O uso das partículas menores justifica-se, pois elas auxiliam na melhor interação das partículas com a resina, proporcionando menores vazios nos painéis e também melhor acabamento superficial (CHRISTOFORO et al, 2016).…”

Importância da madeira de florestas plantadas para a indústria de manufaturados

“…Os principais enfoques recentes desses grupos incluem os estudos das propriedades da madeira e seus derivados para estruturas (Calil Neto et al, 2014;Perlin et al, 2015;Almeida et al, 2016;Christoforo et al, 2016;Lahr et al, 2016;Molina et al, 2016;Nascimento et al, 2017) e as construções em madeira (Krüger et al, 2011;Folz & Ino, 2012;Andrade Junior et al, 2014;De Araujo et al, 2016a, 2016b, 2016cNegrão et al, 2016;Cheung et al, 2017).…”